| Summary: | 博士 === 國立臺灣科技大學 === 電機工程系 === 95 === This dissertation proposes a novel rotor position estimator and controller design for interior permanent magnet synchronous motor (IPMSM) drive systems. First, a simple rotor position estimating technique is presented. By measuring the stator current and compensating for the influence of the back EMF, the rotor position and velocity can be estimated. The simple position estimation is achieved only using the inverter switching states and detecting their relative slopes of the stator current. The estimating technique does not relate to the motor parameters. This dissertation uses the estimating technique to the constant torque region but not to the field weakening region.
Next, an adaptive backstepping controller, combining with a maximum torque per ampere (MTPA) technique, is proposed for the IPMSM drive system. By using this controller, a fast transient response, good load disturbance rejection capability, and satisfactory tracking ability can be achieved. The controller design procedures can be applied to both speed control and position control. In addition, they can be used for high speed field weakening control.
Finally, a Texas Instruments digital signal processor, TMS320LF2407, is used to execute the rotor position/velocity estimation, current control, speed control, and position control. As a result, the hardware circuit of the drive system is very simple. Several experimental results show that the IPMSM drive system has widely adjustable speed range from 1 rpm to 3500 rpm and precise position control.
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